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Related Experiment Video

Updated: Jun 6, 2025

A Microfluidic Chip for ICPMS Sample Introduction
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Chip-scale sensor for spectroscopic metrology.

Chunhui Yao1,2, Wanlu Zhang1, Peng Bao1

  • 1Electrical Engineering Division, Department of Engineering, University of Cambridge, Cambridge, UK.

Nature Communications
|November 28, 2024
PubMed
Summary

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This summary is machine-generated.

This study introduces a compact reconstructive spectrometer for near-infrared (NIR) spectroscopy, achieving high resolution and accuracy. The miniaturized sensor offers performance comparable to benchtop instruments for various sensing applications.

Area of Science:

  • Spectroscopy and Spectrometry
  • Optical Engineering
  • Materials Science

Background:

  • Miniaturized spectrometers face performance limitations in resolution and accuracy.
  • Existing devices are typically suited for coarse peak identification.
  • There is a need for high-performance portable spectroscopic sensors.

Purpose of the Study:

  • To develop an integrated reconstructive spectrometer for near-infrared (NIR) applications.
  • To demonstrate a fully packaged sensor with high bandwidth and resolution.
  • To achieve high accuracy in substance classification and concentration measurement.

Main Methods:

  • Development of an integrated reconstructive spectrometer.
  • Packaging of the sensor with auxiliary electronics.

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  • Testing over a 520 nm bandwidth with sub-8 pm resolution.
  • Application in solid substance classification and solution concentration measurement.

    • Main Results:

    • Achieved a record-breaking bandwidth-to-resolution ratio exceeding 65,000.
    • Demonstrated approximately 100% accuracy in classifying solid substances.
    • Measured concentrations of aqueous and organic solutions with high accuracy.
    • Matched the detection limit of commercial benchtop spectrometers (0.1% for glucose).

    Conclusions:

    • The developed miniaturized spectrometer offers exceptional performance for NIR spectroscopic metrology.
    • This technology enables accurate in situ, in vitro, and in vivo sensing.
    • The sensor's capabilities rival those of larger, non-portable instruments.